I have been on sertraline 25 mg for 5 days now and headaches so far are the worst symptom for me. Since day 2 they have changed from an all over headache comparable to a hangover headache into sharp pains that come and go kinda freaking me out as I have read seizure are a rare side effect. I have no history of epilepsy in myself or family but still concerned. I will be talking to my doctor about this, I just want to know if these headaches are something I should worry about. Or if anyone else have had these type of headaches while taking sertraline at 25mg.